What are the main materials for making glass?
The melting point of silicon dioxide is very high, in order to achieve this Rongdian is very limited. The ancients had to add some other substances when it becomes low melting temperature. When silica melts down also very obtrusive in the process of heating without gradually filtering transition soft, into some other the material of the glass can be in different temperature range all the splendor, powerful shaping operation and effective setting. This substance is a flux.The flux is generally containing sodium oxide, potassium oxide, lead oxide, calcium oxide, barium oxide and other materials, such as limestone, feldspar, sodium carbonate, boric acid, lead compounds, barium compounds. (sodium oxide can reduce the viscosity of glass forming, the glass is easy to melt, plays a good role in flux; barium oxide in glass the formation plays a basic role with sodium oxide; tin oxide can increase the glass chemical stability and mechanical strength; lead oxide can increase density, improve hunting, with special luster; lead can make a glass of light refraction and scattering rate of small glass makes more lustrous and stable.
Silica is the main raw material made of silica on the earth reserves is great. Silica is the main raw material for the main raw material is made of glass stones. The silicon content of different rocks are different. In our life of these materials is the most common.
Glass material mainly has three parts: basic material, flux and colorant, and also includes decoloring agent, clarifying agent and corrosion inhibitor* basic materials for glass making
